Uses basic data like title, description, author, and date that we
are using with existing vanilla meta tags, but extends them to OG
and Twitter Card tags. See [0] and [1].
For the Twitter summary cards specifically, you can optionally add
attribution for your username by adding something like this to your
configuration:
[params.social]
twitter_username = "@mralanorth"
... and for posts with images, you can specify an "image" in the
post's front matter like so:
image = "/2016/09/IMG_20160916_174409.jpg"
And then the theme will opt to use Twitter's "large" summary card.
[0] http://ogp.me/
[1] https://dev.twitter.com/cards/getting-started
